Credit Card Payoff Calculator
See when your credit card balance dies at a fixed monthly payment — and compare it against the minimum-payment trap, priced in actual years and dollars.
Written by Daniel Mercer, CFP® · Reviewed by Sarah Lindqvist, CFA
Last reviewed:
Debt-free in
3 yr 2 mo
Paying a fixed $250 every month
- Total interest
- $2,940
- Total paid
- $9,440
- Minimum payments only
- Never pays off
What this calculator does
Every card statement contains a quiet piece of behavioral engineering: the minimum payment, printed exactly where your eye lands. This calculator prices that suggestion against a plan of your own. Enter your balance, APR, and a fixed monthly payment; it returns your payoff date and total interest — then runs the same balance through a typical declining minimum (2% of the balance with a $25 floor) so the comparison sits in the same panel, in dollars and years.
How the math works
With a fixed payment, the card behaves like any loan: each month interest = balance × (APR ÷ 12); the payment covers interest, the remainder cuts principal. The payoff time follows the standard formula n = −ln(1 − B·r/M) ÷ ln(1 + r).
With minimums only, the payment itself is recalculated every month as max(2% × balance, $25). Because the payment shrinks with the balance, principal reduction slows continuously — and if the percentage minimum is below the monthly interest rate, the balance never falls at all. The calculator simulates this month by month rather than pretending a formula fits it.
A worked example
A $6,500 balance at 24.9% APR, attacked with a fixed $250 per month:
- Monthly interest at the start: 6,500 × (24.9% ÷ 12) ≈ $135 — more than half of the first payment
- Payoff: about 38 months (3 years 2 months)
- Total interest: roughly $2,940
Now the same balance on minimum payments: 2% of $6,500 is $130 — less than the $135 of monthly interest. The balance doesn’t shrink; it grows. This isn’t an edge case invented for effect: it’s the direct arithmetic of a 2% minimum meeting a 24.9% APR, and it’s why regulators require statements to disclose the long-run cost of minimum payments. Even where the issuer’s formula (interest + 1% of principal) technically amortizes, payoff routinely stretches past 20 years with more paid in interest than the original balance.
Practical tips
- Fix your payment at today’s minimum — forever. The simplest effective trick: whatever your minimum is this month, keep paying that amount even as the required minimum falls. It converts the issuer’s formula into a fixed-payment plan without budgeting a single new dollar.
- Push the payment above the interest line first. Progress only starts when your payment exceeds the monthly interest (balance × APR ÷ 12). Below that line, you’re renting the debt.
- Stop adding while you subtract. A payoff plan with ongoing new charges is a treadmill. Move daily spending to a debit card or a second card that’s paid in full monthly, so the target balance only moves one direction.
- Multiple cards? Order matters. Attack the highest APR first while paying minimums elsewhere — or run your full debt list through the debt snowball calculator to compare orderings with real numbers.
After the payoff
The habit that killed the balance — a fixed monthly amount leaving your checking account — is worth keeping. Redirect it: the same $250 that cleared this card becomes an emergency fund in months (size it with the emergency fund calculator) and after that, compounding growth (see the compound interest calculator). The cash flow already exists; only its destination changes.
Frequently asked questions
- Why is paying a fixed amount so much better than the minimum?
- Card minimums are typically a percentage of the balance (often 1–2%, or interest plus 1%), so the required payment shrinks as the balance falls — stretching the payoff across decades. A fixed payment does the opposite: as the balance drops, a growing share of the same payment hits principal. Nothing about your budget changes; only the trajectory does.
- Can a minimum payment really never pay off the card?
- Yes, in one specific case: when the minimum percentage is below the monthly interest rate. A 2%-of-balance minimum against a 24.9% APR (about 2.07% monthly interest) doesn't cover the interest, so the balance creeps upward forever. Most issuers avoid this with an "interest plus 1%" formula or a dollar floor — but the calculator flags the trap when your numbers trigger it.
- What APR should I enter?
- The purchase APR from your latest statement — US cards have averaged above 20% in recent years (the Federal Reserve's G.19 release tracks the current average). If you carry balances at different APRs (purchases vs. cash advances), issuers must apply amounts above the minimum to the highest-APR balance first, so your effective payoff rate is usually close to the highest APR you carry.
- Should I use a balance transfer instead?
- A 0% intro transfer can be excellent if — and only if — you can clear the balance inside the promo window. Price the transfer fee (typically 3–5%) against the interest this calculator shows for your fixed-payment plan. A $6,500 balance costing $2,900 in interest easily justifies a $195–325 fee; just don't let a fresh $0 card refill while you pay off the old balance.
- Does making two payments a month help?
- Slightly, yes. Card interest accrues on your average daily balance, so paying half your amount two weeks early trims the average balance and the interest charged. The effect is modest compared with simply paying more per month, but it's free — and it also lowers the utilization your credit score sees at statement time.
Sources
Written by
Daniel is a Certified Financial Planner™ with 12 years of experience helping households manage debt, savings, and retirement planning. He writes ToolGrym’s calculator guides and explains the math behind every tool.
Reviewed by
Sarah is a CFA charterholder who reviews every ToolGrym calculator and article for mathematical accuracy. She has 10 years of experience in fixed-income analytics and consumer lending models.